Controlled $g$-dual frames and their approximates in Hilbert spaces
In this paper, we introduced and characterized the controlled $g$-duals of a frame in a separable Hilbert space $\mathcal{H}$ . Afterwards, we obtained new $C$-controlled $g$-dual frames from the given $C$-controlled $g$-dual frames. In addition, the approximation for controlled $g$-dual frames was defined and some of their properties were investigated. Finally, we characterized the relationship between approximately $C$-controlled dual and $C$-controlled $g$-dual.
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- [1] P. Balazs, J.P. Antoine and A. Grybos, Weighted and Controlled Frames, Int. J.
Wavelets Multiresolut. Inf. Process. 8 (1), 109-132, 2010.
- [2] I. Bogdanova, P. Vandergheynst, J.-P. Antoine, L. Jacques and M. Morvidone, Stere-
ographic wavelet frames on the sphere, Applied Comput. Harmon. Anal. 19, 223-252,
2005.
- [3] P. Casazza and O. Christensen, Perturbation of operators and applications to frame
theory, J. Fourier Anal. Appl. 3, 543-557, 1997.
- [4] O. Christensen, A Paley-Wiener theorem for frames, Proc. Amer. Math. Soc. 123,
2199-2202, 1995.
- [5] O. Christensen, An introduction to Frame and Riesz Bases, Birkhäuser, Boston, 2003.
- [6] O. Christensen and R.S. Laugesen, Approximately dual frames in Hilbert spaces and
applications to Gabor frames, Sampl. Theory Sig. Image Process. 9 (3), 7789, 2011.
- [7] M.A. Dehgan and M.A. Hasankhani, g-dual frames in Hilbert spaces, U.P.B. Sci. Bull.
75, 129-140, 2013.
- [8] R. Duffin and A. Schaeffer, A class of non-harmonic Fourier series, Trans. Amer.
Math. Soc. 72, 341-366, 1952.
- [9] S.M. Ramezani, G-duals of continuous frames and their perturbations in Hilbert
spaces, U.P.B. Sci. Bull. 82, 75-82, 2020.
- [10] S.M. Ramezani and A. Nazari, g-orthonormal bases, g-Riesz bases and g-dual of g-
frames, U.P.B. Sci. Bull. 78, 91-98, 2016.
- [11] M. Rashidi-Kouchi, A. Rahimi and F.A. Shah, Duals and multipliers of controlled
frames in Hilbert spaces, Int. J. Wavelets, Multiresolut. Inf. Process. 16 (5), 1-13,
2018.
- [12] W. Sun, Stability of g-frames, J. Math. Anal. Appl. 326 (2), 858-868, 2007.